41results about How to "Reduce detection noise" patented technology

The invention relates to a method and its medium box for quantity measuring peculiar analysis substance by single capture medium. The method comprises the following steps: combining the tested analysis substance with solid phase capture medium, labeling analysis substance which has been captured by capture medium with report molecule, cleaning-up analysis substance from compound, recombining tested analysis substance with new solid phase capture medium, ascertaining content of analysis substance by report molecule's label signal. The medium box comprises capture device, testing device report molecule used as label and analysis substance eluent.

A magnetic field component in a Z direction is guided by a magnetic field guide layer and applied to a magnetic sensor in an X direction that is the same as a sensitivity axis direction thereof, and a detection output is obtained. A bridge circuit is formed with a plurality of magnetic sensors and configured such that an output is not provided for a magnetic field component in the X direction. However, when an external magnetic field in the X direction is drawn to the magnetic field guide layer, variation of sensitivity for the X direction may occur. Thus, soft magnetic characteristics of a first portion of the magnetic field guide layer are deteriorated to decrease the magnetic permeability of the first portion.

An edge extraction device can reduce detected noise other than a contour of an article, and can improve the operability. The edge extraction device includes: an edge detection section which calculates edge strength from an image and detects an edge; a labeling processing section which performs labeling processing on the edge detected by the edge detection section and calculates a length of the edge; an edge enhancement processing section which performs edge enhancement processing by using a value corresponding to the length of the edge, which is calculated by the labeling processing section, and the edge strength, which is calculated by the edge detection; and an edge extraction section which performs binarization processing on a value of the image, which is enhanced by the edge enhancement processing section, by using an adjustable threshold value, and extracts a predetermined edge.

A nano-resonator device comprising at least one fixed element and at least one mobile element with respect to the fixed element, first electromagnetic means, integrated or fixed on the fixed element, and second electromagnetic means, integrated or fixed on the mobile element, to generate an oscillating movement of the mobile element.

Systems and methods for multiplexing two or more channels of a quantum key distribution (QKD) system are disclosed. A method includes putting the optical public channel signal (SP1) in return-to-zero (RZ) format in a transmitter (T) in one QKD station (Alice) and amplifying this signal (thereby forming SP1*) just prior to this signal being detected with a detector (30) in a receiver (R) at the other QKD station (Bob). The method further includes precisely gating the detector via a gating element (40) and a coincident signal (PN1′) with pulses that coincide with the expected arrival times of the pulses in the detected (electrical) public channel signal (SP2). This allows for the public channel signal to have much less power, making it more amenable for multiplexing with the other QKD signals.

A magnetic sensor includes a channel layer, a magnetization free layer placed on a first section of the channel layer, and a magnetization-fixed layer placed on a second section of the channel layer. The areal resistance of the interface between the channel layer and the magnetization free layer is lower than the areal resistance of the interface between the channel layer and the magnetization-fixed layer.

The invention discloses an integrated gating active quenching / restoring circuit. The integrated gating active quenching / restoring circuit comprises a quick detection circuit, a pulse generation circuit, a pixel control circuit, a quenching circuit and a restoring circuit, wherein the quick detection circuit is used for processing a detected anode current signal of an SPAD (Single Photon Avalanche Diode) into a pulse signal, the pulse signal can be output through the pulse generation circuit, the pixel control circuit is controlled by an output signal and a gating signal of the pulse generation circuit, the restoring circuit and the quenching circuit are respectively controlled by outputs of the pixel generation circuit, outputs of the restoring circuit and the quenching circuit can be fed back to an anode of the SPAD, and the restoring and the quenching of the SPAD can be controlled. According to the integrated gating active quenching / restoring circuit disclosed by the invention, by adopting a gating control method, the dark counting rate of the SPAD can be effectively reduced, the quenching time can be controlled by the pulse generation circuit, and the integrated gating active quenching / restoring circuit has the advantages of compact area and low power consumption.

A method detects noise in a document image. The image includes pixels representing at least text and image data forming the document. The noise includes at least one of halftone, bleeding and texture noise. The method partitions the image into tiles, formed of pixels, determines a set of dominant colors for each tile, associates each pixel with one of the determined dominant colors, and then determines for each dominant color a fragmentation statistic, and applies a threshold to each statistic to detect the noise in the corresponding dominant color in the tile. Detected noise in the image is reduced by (a) merging colors with noise to one color without noise if the noise is halftone noise or texture noise; and (b) removing the colors with noise if the noise is bleeding noise. The pixels of the tile are then quantized to those remaining dominant colors of the set.

The invention discloses a receiving end light power on-line detection device and an implementation method thereof. The receiving end light power on-line detection device comprises a universal ONU (Optical Network Unit) module and a data acquisition and processing module, wherein the universal ONU module comprises a photoelectric conversion circuit and an operational amplifying circuit; and the device is characterized in that: an external BNC (Bayonet Nut Connector) terminal is additionally arranged on the universal ONU module and is connected with an output end of the operational amplifying circuit. In the invention, real-time on-line monitoring of an optical fiber channel state can be realized under the condition of normal communication of an optical fiber communication system.

The invention provides a composite ion source bipolar linear ion trap mass analyzer which is composed of an ultraviolet lamp ion source, an ion repulsion electrode, a focusing electrode, a guide electrode, a front end cap electrode, a trap fixing seat, an electron multiplier, an ion trap analyzer, a rear end cap electrode, an EI filament ion source and an electron multiplier shielding seat. The invention has a dual-mode switchable ionization mode and a bipolar operation mode, adopts a new cylindrical ion trap electrode structure, reduces the difficulty of ion trap processing, adopts a shieldeddouble-electron multiplier design, respectively receives and amplifies ions ejected from an ion trap analyzer, reduces detection noise, and improves detection sensitivity of an instrument. The invention is reasonable in design, adopts double ion gate design, is effectively compatible with soft ionization mode and hard ionization mode, is combined with chromatography or liquid phase, separates each component in the detected sample, is more favorable for qualitative and quantitative analysis of the sample by the instrument, and can be applied in soft ionization, hard ionization and bipolar detection of the substance.

The invention discloses a portable microfluidic detection apparatus and method for organophosphorus pesticide. A microfluidic chip is fixed at the upper part in a shell of a detector; the microfluidic chip is provided with, from left to right, a sample pretreatment and introduction chamber, an impurity filtering assembly, a mixed driving assembly, a porous medium enzyme reaction assembly, a reaction chamber, a photoelectric detection chamber and a waste liquid discharge outlet which are successively connected and communicated; a permanent magnet fixedly connected with the upper surface of a waterproof rotary grinding plug is arranged under an electromagnet, and the waterproof rotary grinding plug is located over the sample pretreatment and introduction chamber and can move downwardly to match with the sample pretreatment and introduction chamber; a grinding motor is installed in the waterproof rotary grinding plug and is connected with a grinding rotary cake through a grinding motor shaft; and a 405-nm laser diode is fixedly arranged over a photoelectric detection chamber, and a photoelectric detector is fixedly arranged under the photoelectric detection chamber. The portable microfluidic detection apparatus and method provided by the invention have a sample pretreatment function and can improve sample purity, enhance a contact area between organophosphorus hydrolase and a detection fluid and effectively guarantee detection effects.

The invention discloses a vehicle-mounted radar-in-the-loop real-time simulation test system and a method thereof, comprising: a tested radar on a turntable, a driving operation unit, a display, a real-time controller and a host computer; the driving operation unit includes: a driving operation mechanism and Driving operation signal sensor; host computer includes: virtual proving ground and target test analysis unit; virtual proving ground contains: driving vehicle model and target vehicle model; driving vehicle model is used for virtual loading of the tested radar; real-time controller includes: spectrum measurement Unit, target simulation unit, motion controller and data acquisition card; spectrum measurement unit includes: millimeter wave signal transceiver, millimeter wave downconverter, millimeter wave signal analyzer, delay controller, millimeter wave signal generator, millimeter wave upconverter. The invention can realize the simulation test of the radar under various road conditions through the real-time simulation of radar hardware in the loop, driving operation, target simulation, turntable rotation control and millimeter wave delay control.